Renovation ROI Calculator
Estimate renovation costs and value uplift for common UK home improvements. See which renovations offer the best return on investment.
Which home renovations add the most value?
Some renovations add far more value than others. Cosmetic work like redecoration often gives the highest ROI, because it costs little and changes a buyer's first impression a lot.
Extensions and loft conversions add the most value in absolute terms and can return 80–120% of their cost in the right location. New kitchens and bathrooms typically return 50–80% of their cost — they won't always pay for themselves, but they make a property significantly more sellable.
Essential repairs like rewiring, new roofs, and damp treatment may not add much value directly, but they remove major red flags that would otherwise reduce offers or deter buyers entirely. Think of them as protecting value rather than adding it.
Frequently asked questions
- Which renovations add the most value to a house?
- Extensions and loft conversions typically add the most value in absolute terms (80–120% ROI). For smaller budgets, cosmetic improvements like redecoration and new flooring offer the best percentage return. New kitchens and bathrooms are strong middle-ground investments at 50–80% ROI.
- Are these cost estimates accurate?
- The costs are based on 2024/25 UK averages for a typical 3-bedroom property. Actual costs vary significantly by location (London can be 50–100% more), specification (budget vs premium), and the specific contractor. Always get multiple quotes before committing.
- Should I renovate before selling?
- It depends on the local market and the renovation. Cosmetic updates (paint, flooring, garden) almost always pay off before a sale. Major structural work is harder to recoup in the sale price. In a strong seller's market, buyers are more willing to take on projects themselves.
- What is a good renovation ROI?
- Any renovation that returns more than 50% of its cost in value uplift is considered good. Above 100% means the renovation pays for itself and adds extra value — this is realistic for cosmetic work and well-planned extensions in desirable areas.
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Estimates only, based on the assumptions you enter and current published rates. Not financial advice. Your actual costs depend on your circumstances and your lender. HomeThink is not authorised or regulated by the Financial Conduct Authority and recommends no lender or mortgage.
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